JPH11194771A - Control box of keyboard musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the control box of the keyboard musical instrument which can improve the outward appearance of the keyboard musical instrument and reduce the manufacture cost by enabling common use for cases of fence type shelf plates and one shelf plate. SOLUTION: The control box of the keyboard musical instrument, fitted to the shelf plate 10 supporting a keyboard, is equipped with a box body 2 having a rectangular bottom wall 3, side walls 4 which extend upward from four ends of the bottom wall 3 and continue mutually and form a rectangular parallelopiped having an opening atop together with the bottom wall 3, and a fitting part 13 which extends horizontally from the upper ends of the side walls 4 and is fitted to the reverse surface of the shelf plate 10; and the border part 5 between the bottom wall 3 of the box body 2 and the side walls 4 and the border part 6 between the side walls 4 are formed of curved surfaces.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control box for a keyboard instrument having an operation section such as a switch on a front surface thereof and attached to an upright electronic piano or the like.

[0002]

2. Description of the Related Art Upright-type electronic pianos have been pursued so that they can be played with the same feeling as an upright piano as much as an electronic piano.
While having almost the same exterior as an upright piano,
It has a simulated action that mimics that action. For the same reason, unlike an ordinary electronic piano, the upright type electronic piano does not have the power switch, volume, etc. arranged side-by-side with the keyboard, but puts it together in a control box, and this control box stands out below the keyboard So that it is not attached.

FIG. 3 shows such a conventional control box (hereinafter simply referred to as "box"). The box 31 includes a box body 32. The box body 32 is formed in a rectangular parallelepiped shape by bending a metal plate such as an iron plate by pressing. A board or the like (not shown) is housed inside the box main body 32, and a power switch, a volume for adjusting a volume, a jack for connecting headphones, etc. (Not shown). The upper end of each side wall of the box body 32 is a flange-like mounting portion 33 extending horizontally outward.
Is formed with a hole 34 for screwing.

On the other hand, an upright type electronic piano has a shelf supporting a keyboard (both not shown) through a reed,
Similar to a normal upright piano, there are a piano made of a single wooden board and a fence made by assembling a plurality of hollow square steel pipes (see FIG. 1). . When the box 31 is a single plate, the box 31 is screwed to the lower surface of the box 31 via the mounting portion 33 of the box body 32, while the box 31 is formed in a fence shape. The height of the box body 32 is made higher than that of a single plate, the upper part is inserted between the steel pipes, and the box body 32 is screwed to the lower surface of the reed supported by the shelf plate. In the latter case, the reason that the box 31 is attached to the reed instead of the shelf is that, when the box 31 is attached to the shelf, the upper side of the box body 32 remains open except for the portion where the steel pipe material is present, and dust and the like are left inside. This is to prevent intrusion and adverse effects on the substrate and the like.

[0005]

However, the conventional box 31 has a hard impression because the box body 32 is formed by bending a metal plate and the corner portion 35 is formed at the bent portion. Giving it the appearance of a piano. In addition, in the case where the shelf board is fence-shaped and in the case of one board,
It is necessary to prepare two types of box bodies 32 having different heights, and there is a disadvantage that the manufacturing cost is increased accordingly.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and can improve the appearance of a keyboard instrument, and can be commonly used for a case where a shelf is a fence and a case where a shelf is a single plate. It is an object of the present invention to provide a keyboard instrument control box that can reduce the manufacturing cost.

[0007]

In order to achieve this object, the present invention provides a control box for a keyboard instrument mounted on a shelf supporting a keyboard, comprising a rectangular bottom wall and four sides of the bottom wall. It has a plurality of side walls that extend upward from the ends and are continuous with each other, form a rectangular parallelepiped with the bottom wall open at the top, and a mounting portion that extends horizontally from the upper ends of the plurality of side walls and is attached to the lower surface of the shelf board. A box main body is provided, and a boundary between the bottom wall and the plurality of side walls of the box main body and a boundary between the plurality of side walls are configured by curved surfaces.

[0008] The control box of this keyboard instrument
It is attached to the lower surface of the shelf via the attachment portion of the box body. In addition, the boundary between the bottom wall and the plurality of side walls, and the boundary between the plurality of side walls are curved surfaces, and such a curved shape gives a soft and favorable impression, so that the keyboard instrument has The appearance can be improved.

In this case, it is preferable that the box body is formed by pressing a metal plate into a deep press.

[0010] According to this configuration, the curved portion can be naturally formed between the bottom wall and the side wall and the boundary between the side walls only by pressing the metal plate deep and press-forming, and the box body can be easily and inexpensively manufactured. can do.

In this case, it is preferable to further include an attachment plate for attaching the box main body to the lower surface of the shelf board together with the mounting portion while the box main body is covered from above.

According to this configuration, the control box is mounted on the lower surface of the shelf via the mounting portion and the mounting plate. Further, the mounting plate covers an open portion of the box main body and functions as a cover thereof. Therefore, when the shelf is fence-shaped, dust can be prevented from entering the inside of the box body by this mounting plate, so that it is attached to the lower surface of the shelf in the same manner as in the case of a single shelf. It becomes possible. As a result, the box body can be shared between the case where the shelf is a fence and the case where the shelf is a single plate.
Manufacturing costs can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a control box of an upright type electronic piano to which the present invention is applied, and a mounting state thereof. The control box 1 (hereinafter, simply referred to as a “box”) includes a box main body 2. A board or the like (not shown) is housed inside the box main body 2 and a front surface 2 a thereof has A power switch, a volume for adjusting a volume, a jack for connecting headphones, and the like (all not shown) are provided.

The box body 2 is formed by, for example, deep pressing of a steel plate. As shown in FIG. 2, the box body 2 has a rectangular bottom wall 3 and four extending upward from four ends of the bottom wall 3. And two side walls 4 and has a rectangular parallelepiped shape whose upper side is open. As a result of the box body 2 being formed by the deep press forming as described above, the boundary 5 between the bottom wall 3 and the side wall 4 and the boundary 6 between the side walls 4 and 4 are all formed of curved surfaces. The upper edge of each side wall 4 of the box body 2 is a mounting portion 7 extending horizontally outward.
The mounting portion 7 is continuous in the circumferential direction, and has projections 8 protruding outward at two places near the front part on the left and right sides and one place at the center part on the rear side. The projection 8 has a hole 9 for screwing.

On the other hand, reference numeral 10 in FIG. 1 denotes a shelf board of an upright type electronic piano. The shelf board 10 is formed in a fence shape by assembling a plurality of hollow square steel pipe members 11, and a reed is provided thereon, and a keyboard (neither is shown) is placed on the reed. It is placed. On the lower surface of the shelf 10, a plurality of screw holes 12 are formed at positions corresponding to the holes 9 of the box body 2. The shelf 10 is also used as a ground for a board or the like built in the box body 2.

The box 1 further includes a mounting plate 13. The mounting plate 13 functions to attach the box body 2 to the shelf board 10 and to function as a cover that covers the upper side of the box body 2. For this reason, the mounting plate 13
Has a rectangular shape slightly larger than the box body 2, and has a plurality of holes 14 at positions corresponding to the holes 9 of the box body 2.

As shown in FIG. 1, the box 1 having the above-described structure sandwiches the mounting plate 13 between the box 1 and the shelf plate 10, and forms the hole 9 with the hole 14 of the mounting plate 13 and the lower hole 12 of the shelf plate 10. The tapping screws 15 are passed through these holes 9, 14, 12 in a state where they are aligned with each other.
By being screwed into the shelf, it is attached to the lower surface of the shelf 10.

As described above, according to the box 1 of the present embodiment, the boundary 5 between the bottom wall 3 and the side wall 4 of the box body 2 and the boundary 6 between the side walls 4, 4 are all curved surfaces. With this configuration, a soft and favorable impression is given by this curved shape, so that the appearance of the piano can be improved. Further, such a curved surface shape can be naturally formed only by pressing and deep-pressing a steel plate, so that the box main body 2 can be easily and inexpensively manufactured.

Further, since the box body 2 is completely covered by the mounting plate 13, even if the box 1 is mounted on the lower surface of the fence-shaped shelf board 10 as in this embodiment, dust and the like enter the inside of the box body 2. As a result, there is no risk of adversely affecting the substrate and the like. As a result, it is possible to share the box body 2 between the case where the shelf is a fence and the case where the shelf is a single plate, thereby reducing the manufacturing cost.

The present invention is not limited to the embodiments described above, but can be implemented in various embodiments. For example, the embodiment is an example in which the present invention is applied to an upright piano-type electronic piano, but the present invention can also be applied to another keyboard instrument having a similar control box, for example, a silence piano. . In addition, it goes without saying that a suitable metal plate other than the exemplified steel plate may be used as the material of the box body. In addition, the configuration of the details can be appropriately changed within the scope of the present invention.

[0021]

As described above, the control box for a keyboard instrument according to the present invention can improve the appearance of the keyboard instrument, and can be shared between a case where the shelf is a fence and a case where the shelf is a single plate. This has the effect that the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view from below showing a control box of an upright type electronic piano according to an embodiment of the present invention and a mounting state thereof.

FIG. 2 is a perspective view of a box body of the control box.

FIG. 3 is a perspective view of a box body of a conventional control box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Control box 2 Box body 3 Bottom wall 4 Side wall 5 Boundary part between bottom wall and side wall 6 Boundary part between side walls 8 Mounting part 10 Shelf board 13 Mounting plate

Claims (3)

[Claims] 1. A control box for a keyboard instrument mounted on a shelf supporting a keyboard, comprising: a rectangular bottom wall, extending upwardly from four ends of the bottom wall and continuous with each other;
A box body having a plurality of side walls forming a rectangular parallelepiped having an upper side opened together with the bottom wall; and a mounting portion extending horizontally from upper ends of the plurality of side walls and mounted to a lower surface of the shelf board. A control box for a keyboard instrument, wherein a boundary between the bottom wall and the plurality of side walls and a boundary between the plurality of side walls are formed by curved surfaces. 2. The control box for a keyboard instrument according to claim 1, wherein the box body is formed by pressing a metal plate into a deep press. 3. The apparatus according to claim 1, further comprising: a mounting plate for mounting the box main body to a lower surface of the shelf board together with the mounting portion while covering the box main body from above. Or the control box of the keyboard instrument of 2.